This document provides a comprehensive service manual for the Aiwa NSX-S707 and NSX-S708 Compact Disc Stereo Cassette Receivers. It details the device's functions, technical specifications, usage features, and maintenance information.
The Aiwa NSX-S707 and NSX-S708 are integrated audio systems designed to provide a complete home entertainment experience. They combine a compact disc player, a stereo cassette receiver, and an amplifier into a single unit, offering versatility for various audio sources. The systems are designed for ease of use and offer a range of features suitable for both casual listening and more involved audio setups. The inclusion of a remote controller enhances user convenience, allowing for operation from a distance. The modular design, with separate components for the CD/cassette unit and speakers, provides flexibility in placement and setup.
Function Description:
The core functionality of the NSX-S707 and NSX-S708 revolves around their ability to play audio from multiple sources. The "Compact Disc Stereo Cassette Receiver" designation highlights its primary capabilities:
- Compact Disc Playback: The integrated CD player supports standard audio CDs, allowing users to enjoy their music collection with digital clarity. The service manual indicates a "Basic CD Mechanism: 4ZG-1 Z4DSHNC," suggesting a reliable and standard CD playback system.
- Stereo Cassette Playback and Recording: The cassette receiver component enables playback of pre-recorded cassette tapes and likely supports recording from other sources, such as the CD player or external inputs. The "Basic Tape Mechanism: 2ZM-3MK2 YPR4N" points to a dual-cassette deck, which is common in such systems for features like continuous playback or high-speed dubbing.
- Radio Reception: As a "receiver," the unit includes a built-in radio tuner, capable of receiving both FM and AM broadcasts. This allows users to tune into their favorite radio stations. The schematic diagrams (TUNER: EZ and TUNER: K) confirm the presence of a tuner section, with components like PLL ICs (LC72131B) and AM/FM input sections.
- Amplification and Speaker Output: The system integrates an amplifier to drive external speakers, providing stereo audio output. The inclusion of "Speaker" in the system configuration (SX-ANS706 for NSX-S707 and SX-ANS707 for NSX-S708) confirms that these are complete audio systems with dedicated speaker units.
- Remote Control: The "Remote Controller" (RC-7AS06) is a key usage feature, allowing users to operate the system's various functions—such as power, volume, source selection, and playback controls—from a comfortable distance.
Important Technical Specifications:
While detailed electrical specifications like power output or frequency response are not explicitly listed on the cover page, the "Electrical Main Parts List" and schematic diagrams offer insights into the internal architecture and component choices.
- CD Mechanism: 4ZG-1 Z4DSHNC. This is a specific model number for the CD drive, indicating a standardized and serviceable component.
- Tape Mechanism: 2ZM-3MK2 YPR4N. This model number for the tape deck suggests a dual-cassette mechanism, often implying features like auto-reverse or high-speed dubbing.
- System Configuration:
- NSX-S707: CX-NS707 (CD/Cassette unit, Type: EZ,K) and SX-ANS706 (Speaker).
- NSX-S708: CX-NS708 (CD/Cassette unit, Type: EZ) and SX-ANS707 (Speaker).
- The "Type: EZ,K" and "Type: EZ" designations likely refer to regional variations or specific feature sets, particularly concerning the tuner section (as indicated by "TUNER: EZ" and "TUNER: K" in the schematic diagrams).
- Remote Controller: RC-7AS06. This is the model number for the dedicated remote control unit.
- Key Integrated Circuits (from Electrical Main Parts List):
- LC866560W-5G73 / LC866560W-5H26: These are likely the main microcontrollers responsible for overall system control, including user interface, source switching, and possibly some audio processing.
- BA3835S: This could be an audio processing IC, possibly for tone control or sound enhancement.
- BU4094BCF: These are CMOS 8-bit shift registers, commonly used for controlling LEDs, displays, or other peripheral components.
- BU9262AFS: This might be an audio signal processor or a control IC for a specific function.
- NJM4558MD: A dual operational amplifier, widely used in audio circuits for pre-amplification, buffering, or filtering.
- LA1837: This is a common AM/FM tuner IC, confirming the radio functionality.
- BU1920FS: An RDS (Radio Data System) decoder IC, indicating that the tuner supports RDS functionality for displaying station information.
- LEDs: The extensive list of LEDs (SLP9118C, SLZ736A, SLR-56PTT31, SLP-7131F, SLZ-738A, SLZ 936-30) suggests a sophisticated user interface with various indicators for power, source, playback status, and possibly sound modes. The presence of "P-GRN" (presumably Pure Green) LEDs indicates specific color coding for certain indicators.
- Capacitors and Diodes: A wide array of chip capacitors, electrolytic capacitors, and various diodes (MC2836, MC2838, KDS184, 1SS254, 1N4003, RS603M, MTZJ series Zener diodes) are listed, forming the backbone of the power supply, filtering, and signal processing circuits.
- Transistors: Numerous transistors (RN1410, KTC3198GR, RT1N, 2SK2158, 2SC3052F, DTA123JK, RT1P, 2SA1235F, CSA1362GR, 2SA1296, 2SC4115SRS, 2SB1370, KTA1266GR, CC5551, CMBT5551, 2SK2937) are used for amplification, switching, and control functions throughout the system.
- Switches: Various switches are listed, including rotary encoders (EC16B24304, EC12E12244) for volume or tuning, and tactile switches (EVQ11G04M) for button inputs.
- Transformers: The presence of power transformers (T101, T102) and fuse clamps (TP00351-51) indicates a robust power supply section.
Usage Features:
The design of the NSX-S707 and NSX-S708 emphasizes user interaction and convenience.
- Front Panel Controls: The "Mechanical Parts List" details various "KEY" components (OPEN, POWER, BBE, JOG, ASSY FUN, MIC, REC, KARAOKE, REC E, ASSY PLAY, ASSY PAUSE), indicating dedicated buttons and a jog dial for direct control of functions. The "WINDOW, DISPLAY" components suggest a clear display for showing status, track information, or radio frequencies.
- Connectivity: The inclusion of "JACK, 3.5MO (MSC)" and "JACK, 3.5MONO" (for headphones or auxiliary input/output) and "JACK, PIN 4P R/W/B" and "JACK, PIN 6P R/W" (likely for external audio devices or microphones) indicates good connectivity options. The "TERMINAL, 1P MSC" and "TERMINAL, SP 4P32SV1-05" suggest speaker terminals and possibly other input/output connections.
- RDS Functionality: The presence of the BU1920FS IC implies that the radio tuner supports RDS, which can display information like station names, program types, and traffic announcements, enhancing the radio listening experience.
- Cassette Features: The dual-cassette mechanism (2ZM-3MK2 YPR4N) typically offers features such as:
- High-speed dubbing: For quick copying of tapes.
- Continuous playback: Allowing one tape to play after another.
- Auto-reverse: For uninterrupted playback on both sides of a tape.
- Recording capability: From CD, radio, or external inputs.
- Sound Enhancement: The "KEY, BBE" suggests a sound enhancement feature, likely a bass or treble boost, to tailor the audio output to user preferences. The "KEY, KARAOKE" and "KEY, MIC" indicate support for karaoke functions, allowing users to sing along to music.
Maintenance Features:
The service manual itself is a primary maintenance feature, providing essential information for troubleshooting, repair, and component replacement.
- Detailed Parts Lists: The "Electrical Main Parts List" and "Mechanical Parts List" provide comprehensive inventories of all components, including their part numbers and descriptions. This is crucial for identifying and ordering replacement parts.
- Schematic Diagrams: The inclusion of schematic diagrams for the main board, tuner, and front assembly is invaluable for technicians. These diagrams illustrate the circuit layout, component interconnections, and signal paths, enabling effective diagnosis of electrical faults.
- Basic Mechanism Information: The explicit mention of "Basic Tape Mechanism: 2ZM-3MK2 YPR4N" and "Basic CD Mechanism: 4ZG-1 Z4DSHNC" simplifies maintenance by directing technicians to specific sub-assemblies for repair or replacement. The note "If requiring information about the CD mechanism, see Service Manual of 4ZG-1, S/M Code No. 09-983-249-3OT" further streamlines maintenance by referencing dedicated manuals for complex components.
- Revision Publishing: The note "Replace this Service Manual with 'Revision Publishing' when it is issued" indicates a commitment to keeping the documentation current, ensuring that technicians always have access to the latest information.
- Suffix Codes: The suffix codes (A, B, C, D, EZ, K, EZ,K, EZSE, KSTE, 8EZE) in the parts lists denote specific part usages or regional variations, helping to ensure that the correct components are used for different models or markets.
- Easy Disassembly (implied): While not explicitly stated, the detailed mechanical parts list with components like "PANEL, LEFT," "PANEL, TOP," "CABI, FR," "BOX, CASS," and various "WINDOW" and "KEY" parts suggests a design that allows for modular disassembly and access to internal components for servicing. The presence of various screws (S-SCREW, TAPPING SCREW, QT2+3-10 GLD) further supports this.
- Cables and Connectors: The listing of FFC (Flat Flexible Cable) cables and various connectors (CONN ASSY, 8P RPB) indicates that internal wiring is designed for easy connection and disconnection during servicing.
In summary, the Aiwa NSX-S707 and NSX-S708 Compact Disc Stereo Cassette Receivers are versatile audio systems offering CD, cassette, and radio playback with integrated amplification. They feature a user-friendly interface with remote control, various front panel controls, and sound enhancement options. From a maintenance perspective, the detailed service manual, including comprehensive parts lists, schematic diagrams, and references to specific mechanism manuals, provides essential resources for efficient troubleshooting and repair.
To Next Page
Need help?
General
